Habitat: Species is distributed in alluvial soils of sand, gravel, and mud along streams, lakes, and sloughs; roadside ditches, prairie swales, and along railroads; it is one of the weediest Illinois Cyperus.

ILPIN Notes:
This species has a hard, corm-like rhizome. Its bottlebrush spikes have horizontal, flattened spikelets with mucronate, acute scales. Ref. 8 says highly variable, all degrees of intergradation among the several characters.

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